Override default phtml files?

Question

I want to override customer/address/edit.phtml and customer/form/address.phtml files for my module, In my module layout.xml I used the code below for edit.phtml but didn't override:

<customer_address_form translate="label">
    <reference name="customer.address.edit">
        <action method="setTemplate">
            <template>mycompany/mymodule/customer/address/edit.phtml</template>
        </action>
    </reference>
</customer_address_form>